Annals of Biomedical Engineering

, Volume 35, Issue 8, pp 1471–1483

Relative Contributions of Collagen and Elastin to Elasticity of the Vocal Fold Under Tension

  • Roger W. Chan
  • Min Fu
  • Lindsay Young
  • Neeraj Tirunagari
Article

DOI: 10.1007/s10439-007-9314-x

Cite this article as:
Chan, R.W., Fu, M., Young, L. et al. Ann Biomed Eng (2007) 35: 1471. doi:10.1007/s10439-007-9314-x

Abstract

This study examined the contributions of collagen and elastin to the tensile elastic properties of the vocal fold lamina propria. Uniaxial stress–strain responses of vocal fold cover and vocal ligament specimens from 20 human larynges (12 males, 8 females) were quantified with sinusoidal stretch-release deformation in vitro. Mid-coronal sections of 12 specimens were examined histologically with Masson’s trichrome and elastin van Gieson stain to quantify the relative densities of collagen and elastin fibers. Results showed that significantly higher levels of collagen were found in the male vocal fold than female, for both the cover and the ligament. For male there was a significantly higher level of elastin in the cover than in the ligament. On average, the elastic modulus of the male cover was about twice that of the female at high-tensile strain (35–40%), whereas the male ligament was 3–5 times stiffer than the female in the same range. The ligament was stiffer than the cover for male, but the opposite was observed for female. These findings suggested that collagen and elastin could contribute differentially to elasticity of the cover and the ligament. The data may provide guidance for surgical reconstruction and tissue engineering of different lamina propria layers.

Keywords

Larynx Lamina propria Elastic modulus Young’s modulus Voice disorders Phonosurgery Biomechanical modeling 

Copyright information

© Biomedical Engineering Society 2007

Authors and Affiliations

  • Roger W. Chan
    • 1
    • 2
  • Min Fu
    • 1
  • Lindsay Young
    • 1
  • Neeraj Tirunagari
    • 1
  1. 1.Otolaryngology – Head & Neck SurgeryUniversity of Texas Southwestern Medical CenterDallasUSA
  2. 2.Graduate Program in Biomedical EngineeringUniversity of Texas Southwestern Medical CenterDallasUSA

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